Summary & Overview
CPT 43621: Total Gastrectomy with Small-Bowel Anastomosis
CPT code 43621 denotes a total gastrectomy with reconstruction by anastomosis of the distal small bowel to the stomach and is used to report surgical removal of the whole stomach with subsequent small-bowel anastomosis. This major abdominal operation has significant clinical and billing implications due to its complexity, typical inpatient setting, and perioperative resource needs. Nationally, accurate reporting of 43621 matters for surgical quality monitoring, hospital reimbursement, and tracking outcomes for complex gastric procedures.
Payors covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what the code represents, the clinical context in which it is used, and the typical sites of service. The publication provides benchmarks where available, summarizes relevant policy and coverage considerations, and outlines common billing and documentation themes associated with major abdominal resections. Data not available in the input is noted where applicable. This resource is intended for coding professionals, hospital billers, clinical leaders, and policy analysts seeking a national-level synthesis of CPT code 43621.
Billing Code Overview
CPT code 43621 describes a surgical procedure for total gastrectomy with reconstruction by anastomosis of the distal small bowel to the stomach. The code covers removal of the entire stomach and creation of a continuity between the remaining proximal gastrointestinal tract and the distal small intestine.
Service type: Major abdominal surgical procedure (open or laparoscopic total gastrectomy with gastrointestinal reconstruction).
Typical site of service: Hospital inpatient surgical setting, operating room, and associated post-anesthesia care areas.
Clinical & Coding Specifications
Clinical Context
A 62-year-old male with a long history of peptic ulcer disease and recurrent gastric outlet obstruction presents with intractable symptoms, weight loss, and failure of medical therapy. Diagnostic workup including endoscopy and computed tomography demonstrates a nonrepairable, diffusely diseased stomach (e.g., severe gastric scarring, pyloric stenosis, or multifocal malignancy not amenable to partial gastrectomy). The surgical team elects to perform a total gastrectomy with reconstruction by anastomosis of the distal divided small bowel to the esophagus or gastric remnant equivalent, consistent with 43621.
Preoperative workflow includes surgical consultation, informed consent noting risks of total gastrectomy (bleeding, leak, nutritional consequences), optimization of comorbidities, nutritional assessment, and perioperative antibiotics. Intraoperative steps involve general anesthesia, abdominal exploration, mobilization and resection of the stomach, division of the proximal small bowel, creation of an appropriate alimentary limb, and anastomosis of the distal divided small bowel to the proximal alimentary tract. Postoperative care includes ICU or step-down monitoring as indicated, pain control, gradual advancement of diet with enteral support as needed, nutritional counseling, and surveillance for surgical complications.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |